% change the look of the captions
\renewcommand{\fnum@figure}{{\zihao{-5}\textbf{Fig.~\thefigure}}}
\renewcommand{\fnum@table}{{\zihao{-5}\textbf{Table \thetable}}}
\let\ocaption\caption
\renewcommand{\caption}[2][]{\ocaption[#1]{{\zihao{-5}\textbf{#2}}}}
\renewcommand{\@makecaption}[2]{%
\vskip\abovecaptionskip%
\sbox\@tempboxa{#1\quad #2}%
\ifdim \wd\@tempboxa >\hsize
#1\quad #2\par%
\else
\global \@minipagefalse
\hb@xt@\hsize{\hfil\box\@tempboxa\hfil}%
\fi
\vskip\belowcaptionskip}

